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Advisories

TTLock Android App < 9.8.260718 Hardcoded BLE Pairing Key Exposure

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Severity
high
Date
Affecting

  • TTLock < 9.8.260718

CWE
  • CWE-321 Use of Hard-coded Cryptographic Key
CVSS
8.6
CVSS V4 Vector
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
Yassine Damiir
Description
TTLock Android application before v9.8.260718 and associated smart-lock firmware contain a hardcoded static AES key vulnerability that allows an attacker within Bluetooth range to decrypt the per-pairing session key transmitted during BLE pairing. Attackers can observe the pairing exchange, recover the persistent session key using the embedded defaultKey, and forge authenticated BLE requests to unlock the device, add fingerprints or access codes, and perform administrative actions without authentication or user interaction.

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